Sintered clutch ring

Abstract

A sintered clutch ring ( 1 ) is described, comprising a rim of clutch teeth ( 2 ) which comprise wedge-like face surfaces ( 3, 4 ) intersecting in an axial plane and flanks ( 5 ) sloping downwardly under an angle of inclination from the tooth back ( 6 ) against the tooth root, with the flanks ( 5 ) being relieved starting from a re-entrant, axially normal shoulder ( 7 ). In order to provide advantageous conditions for press forming the flank reliefs it is proposed that the planes of intersection between the wedge-like face surfaces ( 3, 4 ) extend outside of the center of the teeth and that the mutually axially offset shoulders ( 7 ) of the two flanks ( 5 ) of the clutch teeth ( 2 ) separate the relieved flanks ( 5 ) from a paraxial flank portion ( 8 ) which is substantially triangular and is adjacent to the face surfaces ( 3, 4 ).

1. A sintered clutch ring with a clutch ring axis and a rim of clutch teeth, each clutch tooth having a respective longitudinal axis and comprising respective first and second wedge-like face surfaces intersecting in a respective axial plane, the clutch ring axis lying in each of said axial planes, a respective tooth back, a respective tooth root, and respective first and second flanks, each of said first and second flanks sloping at an angle of inclination from the tooth back towards the tooth root, with the first and second flanks being relieved starting from respective first and second reentrant shoulders axially normal to the longitudinal axis, wherein each axial plane between the respective first and second wedge-like face surfaces extends offset from a respective tooth center along the longitudinal axis of the clutch tooth in a circumferential direction and wherein the first and second reentrant shoulders are axially offset from each other and separate the relieved first and second flanks from respective first and second substantially triangular, axially parallel flank portions adjacent to the first and second wedge-like face surfaces, respectively. 
     
     
       2. A form tool for producing a clutch ring according to  claim 1 , the form tool comprising first and second molds having a partition surface, wherein the first and second molds can be pressed axially against each other, the first mold forming a first hollow mold for the clutch teeth in the region of the wedge-like face surfaces and the second mold forming a second hollow mold for the clutch teeth in the region of the relieved flanks, with the partition surface extending along the reentrant shoulders delimiting the relieved flanks, wherein the partition surface is composed of plane sections which extend in the region of the flanks along the reentrant shoulders in an axially normal manner and extend in the region of tooth backs of each clutch tooth of the clutch ring and tooth gaps between the tooth backs in an inclined manner corresponding to the axial offset between the shoulders.